首页|Recovery of polyimide waste film by mechanical method to improve the heat fade resistance of BPR matrix friction composites
Recovery of polyimide waste film by mechanical method to improve the heat fade resistance of BPR matrix friction composites
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NSTL
Elsevier
With the increasing concern of vehicle safety, higher requirements are put forward for the stability of friction performance of brake linings and clutch surface materials. This work introduces a feasible method to prepare boron phenolic resin (BPR) matrix friction composites with improved heat fade resistance by using recycled polyimide (PI) powders as tribological modifier fillers. The friction and wear behavior of the BPR matrix composites during dry sliding with GCr15 at 100 degrees C, a heating process of 100-350 degrees C, and a temperature of 350 degrees C were investigated. Experimental results showed that recycled PI powders could improve the stability of friction coefficient at high temperatures and reduce the heat fade rate of composites since PI powders could effectively reduce the generation of friction debris under high temperatures peeling. SEM showed that the PI powders could be well embedded in the matrix, and they were tightly and continuously bonded. The wear rate of modified composites was reduced by 61.1% at 350 degrees C, mainly due to the formation of a lubricating film on the contact surfaces, which protected the polymer matrix from severe wear during sliding. When the PI powders content was 10 wt%, the heat fade rate was only about 4.69% for enlarging the applications in the brake linings.
Recycled PI powdersBPR matrix CompositesHeat fade resistanceFriction filmTRIBOLOGICAL PROPERTIESWEAR BEHAVIORPERFORMANCEINGREDIENTSGRAPHITECASHEWRESINSTATE
NSTL
Elsevier
